Dear community, let's build some cool stuff 🚀🚀🚀

Please refrain from publishing the PR before you are assigned to this issue!

1. Bring the support of MCP Apps (https://modelcontextprotocol.io/docs/extensions/apps, ex https://github.com/MCP-UI-Org/mcp-ui) in Archestra Chat UI.
2. Make sure it works in 3'rd third-party UI via our MCP Gateway.
3. Make sure it works in 3'rd third-party UI via our LLM Gateway.
4. Test at least two real-life vendors' MCPs with MCP UI and bring them to our catalog (https://github.com/czlonkowski/n8n-mcp, https://github.com/excalidraw/excalidraw-mcp)

The acceptance criteria is a demo showing all four steps working besides the PR itself 🏆